feat(stats): add placeholder art with artist name for chart grid, fix PNG export

Chart grid cells without artwork now render the artist name (or album
name as fallback) centered on a zinc-800 background with auto-scaling
and word wrapping using system fonts (Helvetica/Arial/DejaVu Sans).

Fix chart grid PNG export which used the unavailable tauri-plugin-fs
writeFile API. Replace with a new save_file Tauri command that accepts
base64-encoded data and writes it to disk.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: pythoninthegrass

.serena/project.yml

@@ -1,20 +1,18 @@
-
-# whether to use project's .gitignore files to ignore files
+# whether to use the project's gitignore file to ignore files
+# Added on 2025-04-07
 ignore_all_files_in_gitignore: true
-
-# list of additional paths to ignore in this project.
-# Same syntax as gitignore, so you can use * and **.
-# Note: global ignored_paths from serena_config.yml are also applied additively.
+# list of additional paths to ignore
+# same syntax as gitignore, so you can use * and **
+# Was previously called `ignored_dirs`, please update your config if you are using that.
+# Added (renamed) on 2025-04-07
 ignored_paths: []
 
 # whether the project is in read-only mode
 # If set to true, all editing tools will be disabled and attempts to use them will result in an error
 # Added on 2025-04-18
 read_only: false
 
-# list of tool names to exclude.
-# This extends the existing exclusions (e.g. from the global configuration)
-#
+# list of tool names to exclude. We recommend not excluding any tools, see the readme for more details.
 # Below is the complete list of tools for convenience.
 # To make sure you have the latest list of tools, and to view their descriptions, 
 # execute `uv run scripts/print_tool_overview.py`.
@@ -76,8 +74,7 @@ base_modes:
 # This setting can, in turn, be overridden by CLI parameters (--mode).
 default_modes:
 
-# list of tools to include that would otherwise be disabled (particularly optional tools that are disabled by default).
-# This extends the existing inclusions (e.g. from the global configuration).
+# list of tools to include that would otherwise be disabled (particularly optional tools that are disabled by default)
 included_optional_tools: []
 
 # fixed set of tools to use as the base tool set (if non-empty), replacing Serena's default set of tools.
@@ -95,10 +92,10 @@ encoding: utf-8
 #   fortran             fsharp              go                  groovy              haskell
 #   java                julia               kotlin              lua                 markdown
 #   matlab              nix                 pascal              perl                php
-#   php_phpactor        powershell          python              python_jedi         r
-#   rego                ruby                ruby_solargraph     rust                scala
-#   swift               terraform           toml                typescript          typescript_vts
-#   vue                 yaml                zig
+#   powershell          python              python_jedi         r                   rego
+#   ruby                ruby_solargraph     rust                scala               swift
+#   terraform           toml                typescript          typescript_vts      vue
+#   yaml                zig
 #   (This list may be outdated. For the current list, see values of Language enum here:
 #   https://github.com/oraios/serena/blob/main/src/solidlsp/ls_config.py
 #   For some languages, there are alternative language servers, e.g. csharp_omnisharp, ruby_solargraph.)
@@ -138,16 +135,16 @@ read_only_memory_patterns: []
 # This does not affect Serena's own files (e.g. memories and configuration files), which always use native line endings.
 line_ending:
 
+# advanced configuration option allowing to configure language server-specific options.
+# Maps the language key to the options.
+# Have a look at the docstring of the constructors of the LS implementations within solidlsp (e.g., for C# or PHP) to see which options are available.
+# No documentation on options means no options are available.
+ls_specific_settings: {}
+
 # list of regex patterns for memories to completely ignore.
 # Matching memories will not appear in list_memories or activate_project output
 # and cannot be accessed via read_memory or write_memory.
 # To access ignored memory files, use the read_file tool on the raw file path.
 # Extends the list from the global configuration, merging the two lists.
 # Example: ["_archive/.*", "_episodes/.*"]
 ignored_memory_patterns: []
-
-# advanced configuration option allowing to configure language server-specific options.
-# Maps the language key to the options.
-# Have a look at the docstring of the constructors of the LS implementations within solidlsp (e.g., for C# or PHP) to see which options are available.
-# No documentation on options means no options are available.
-ls_specific_settings: {}